Develop Reference

AJAX: Store PHP data in a Javascript variable

As stated in the title, I have an ajax call. On the success function I want to store the returned data into a variable for use in my javascript. randNum.php simply returns a random number every 2 seconds, and I would like to use that number for other functions in my scripts. How can I use the data sent back from the php file in my javascript?
I know there are more logical ways to go about this, but want to know how to accomplish the task this way.
var result;
var interval = 2000;
function myCall() {
var request = $.ajax({
url: "randNum.php",
type: "GET",
dataType: "html",
success:function (msg) {
result = msg; //Not working as I intend
setTimeout(myCall, interval);
}
});
}
function(){
do something with result;
}

Declare a Global variable outside of the function and assign response variable to it after the ajax response.
var results;
function TestJSONP(){
$.ajax({
url: "randNum.php",
jsonp: "callback",
dataType: "jsonp",
success: function (response) {
console.log(response);
results = response;
}
});
}

You might not need to specify dataType, but use jqXHR.responseText to get the raw response. Something like
function myCall() {
var request = $.ajax({
url: "randNum.php",
type: "GET",
success:function (data, textStatus, jqXHR) {
result = jqXHR.responseText;
setTimeout(myCall, interval);
}
});
}
When you set dataType, and the response is not that type, then the ajax did not succeed and error call back will be invoked.

Getting json array to create products index problems using Php, json, JS and JSON

Having a few problems creating a products index.

It looks like you're pushing down html as well in the products.php page. Make sure the output of the php that you're retrieving from only returns JSON.
Also, check the syntax on your script:
$.get({
type: "GET",
url: "products2.php",
data: 'id=' + userid,
dataType: "json",
success: function (data) {
document.getElementById("name").innerHTML = data[0];
document.getElementById("decription").innerHTML = data[1];
document.getElementById("price").innerHTML = data[2];
document.getElementById("stock").innerHTML = data[3];
}
});
You were using $rows but attempting to access data. Adding a simple console.log(data); in the success function will dump the results to the console in chrome/firefox so you can see what is being returned. (Be sure to check the network tab as well, as it can give you some tips as to why the data isn't being properly fetched.)

I've done something similar and this worked fine for me:
<?php
$array['status'] = 0;
...
echo json_encode($array);
Populate the array with whatever you need.
And then:
$.ajax({
type: "type",
url: "url",
data: {
data: data
},
success: function (data) {
console.log(data.status);
}
});

Having trouble getting JSON data from database with AJAX

So as the title suggests, I am having difficulty retrieving data from my database with these technologies. This is my current situation:
var username = $('#username').val();
var password = $('#password').val();
// For the sake of example this is a dummy IP
var url = 'http://55.55.55.55/dbfuncts.php?action=getuser&user=' + username;
// For debugging purposes I compare this object with the one I get with the ajax function
var obj1 = {
"name" : "Dave"
};
var obj = $.ajax({
url: url,
type: 'POST',
dataType: 'json'
});
The format of my JSON is supposed to be like this:
{"UserID":"User","Password":"User","Email":"User#questionmark.com","Fname":"Web","Lname":"User","isManager":"0"}
When I go to the URL I am able to see this JSON string in my browser.
Currently when debugging, I find that I keep getting the jqXHR object instead of the json object that I want.
How do I retrieve the information as a JSON from the database?

I don't think jQuery ajax call will return the result directly as you did (but I'm not sure).
I used to get result from ajax call by using callback function as below.
$.ajax({
url: url,
type: 'POST',
dataType: 'json',
success: function(data) {
// data argument is the result you want
console.log(data);
}
});

Try this:
Place the url which gives the json data in the url column.
var jsonData = $.ajax({
url: '*',
dataType:"json",
async: false
}).responseText;
var parsed = JSON.parse(jsonData);
If this does not then try this:
var jsonData1 = $.ajax({
xhrFields: { withCredentials: true },
type:'GET',
url: '*',
dataType:"json",
crossDomain: true,
async: false
}).responseText;
var parsed1 = JSON.parse(jsonData1);
TRY 2:
Ok so try it with Spring MVC. Get the data from the database, and keep it in a url. As given in this link. Ckick Here And then use the above ajax call to access the data from the url.

JSON Data returned from Ajax on Safari is converted into a javascript list

This is something I recently found out, I have the following piece of code in JS:
$.ajax({
type: 'POST',
url: '/requestHandle',
data: data,
success: function(data) {
var places = JSON.parse(data);
// do something
},
error: function(data) {
// do something else
}
});
The data returned from my backend is indeed in JSON format, and var places = JSON.parse(data); this line works perfectly in Chrome and Firefox, it parses my JSON data into a JS list; however, in Safari, var places = JSON.parse(data); gives me error, because data is already a JS list. Instead of doing var places = JSON.parse(data), just changing to var places = data solved the error, I am wondering why it is converted automatically?
Thanks in advance

Your best solution would be to tell jQuery that the response is json so that you will always receive it as js object
$.ajax({
type: 'POST',
url: '/requestHandle',
data: data,
success: function(obj) {
// do something
},
error: function(data) {
// do something else
},
dataType: 'json' // reponse is json so it will always be pre-parsed
});

Convert an xml node to string

I'm getting an xml answer from a server using jquery and I need to have one of its child nodes as a string to further work with it.
Here is my code:
function pollServer(dataObject) {
$.ajax({
type: "POST",
url: '/server.php',
data: dataObject,
success: function (data) {
$xmlDoc = $(data);
$listen = $xmlDoc.find('listen');
console.log($listen);
},
dataType: 'xml'
});
}
I already tried using (new XMLSerializer()).serializeToString(listen) but that gives me an empty string.

The following should work fine for XML:
var listen = $("listen", data)[0].outerHTML;